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Open AccessArticle

Gold in the Oxidized Ores of the Olympiada Deposit (Eastern Siberia, Russia)

1
Institute of Mining, Geology and Geotechnology, Siberian Federal University, 79 pr. Svobodny, 660041 Krasnoyarsk, Russia
2
Department of Mineralogy, Crystallography and Petrography, Saint-Petersburg Mining University, 2 21st Line, 199106 St. Petersburg, Russia
3
LLC Norilskgeologia, 11 Grazhdanskiy Avenue, 195220 St. Petersburg, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Galina Palyanova
Minerals 2021, 11(2), 190; https://doi.org/10.3390/min11020190
Received: 30 December 2020 / Revised: 8 February 2021 / Accepted: 9 February 2021 / Published: 11 February 2021
Native gold and its satellite minerals were studied throughout the 300 m section of oxidized ores of the Olympiada deposit (Eastern Siberia, Russia). Three zones are identified in the studied section: Upper Zone ~60 g/t Au; Middle Zone ~3 g/t Au; Lower Zone ~20 g/t Au. Supergene and hypogene native gold have been found in these zones. Supergene gold crystals (~1 μm), their aggregates and their globules (100 nm to 1 μm) predominate in the Upper and less in Middle Zone. Relic hypogene gold particles (flattened, fracture and irregular morphology) are sporadically distributed throughout the section. Spongiform gold occurs in the Lower Zone at the boundary with the bedrock, as well as in the bedrock. This gold formed in the process of oxidation of aurostibite, leaching of impurities and its further dissolution. Hypogene gold is commonly isolated but for supergene gold typically associated with ferric (hydr)oxides. New formation of gold occurred due to oxidation of sulfide ores and release of “invisible” gold, as well as dissolution, mobilization and re-deposition of metallic hypogene gold. A model for the formation of oxidized ores with the participation of meteoric and low-temperature hydrothermal waters has been proposed. View Full-Text
Keywords: oxide ore; weathering; supergene gold; Olympiada gold deposit; Yenisei Ridge; mineral exploration oxide ore; weathering; supergene gold; Olympiada gold deposit; Yenisei Ridge; mineral exploration
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MDPI and ACS Style

Silyanov, S.A.; Sazonov, A.M.; Zvyagina, Y.A.; Savichev, A.A.; Lobastov, B.M. Gold in the Oxidized Ores of the Olympiada Deposit (Eastern Siberia, Russia). Minerals 2021, 11, 190. https://doi.org/10.3390/min11020190

AMA Style

Silyanov SA, Sazonov AM, Zvyagina YA, Savichev AA, Lobastov BM. Gold in the Oxidized Ores of the Olympiada Deposit (Eastern Siberia, Russia). Minerals. 2021; 11(2):190. https://doi.org/10.3390/min11020190

Chicago/Turabian Style

Silyanov, Sergey A.; Sazonov, Anatoly M.; Zvyagina, Yelena A.; Savichev, Andrey A.; Lobastov, Boris M. 2021. "Gold in the Oxidized Ores of the Olympiada Deposit (Eastern Siberia, Russia)" Minerals 11, no. 2: 190. https://doi.org/10.3390/min11020190

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